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Dissertations / Theses on the topic 'Surface sediment'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Wolcott, John Fredric. "Flume studies of gravel bed surface response to flowing water." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/31033.

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Almost all sediment transport equations incorporate the Shields parameter, which is a ratio of the total boundary shear stress as a driving force and the particle weight as a resisting force. Shields (1936) equated particle resistance to entrainment with particle weight, which is proportional to particle diameter, or bed texture. The present work analyses the particle resistance term in the Shields parameter. As the bed material adjusts to a given flow condition, bed stability increases. The arrangement of particles into more stable configurations is here termed geometric structure, and inclu

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2

Nyander, Annie. "River bed sediment surface characterisation using wavelet transform-based methods." Thesis, Edinburgh Napier University, 2004. http://researchrepository.napier.ac.uk/Output/5885.

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The primary purpose of this work was to study the morphological change of river-bed sediment surfaces over time using wavelet transform analysis techniques. The wavelet transform is a rapidly developing area of applied mathematics in both science and engineering. As it allows for interrogation of the spectral made up of local signal features, it has superior performance compared to the traditionally used Fourier transform which provides only signal averaged spectral information. The main study of this thesis includes the analysis of both synthetically generated sediment surfaces and laboratory

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3

Stromback, Anna Christina. "A sub-surface evaluation of the Weissliegend facies, UK, southern North Sea." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250239.

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4

Jönsson, Anette. "Model studies of surface waves and sediment resuspension in the Baltic Sea /." Linköping : Faculty of Arts and Science, Linköping University, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4680.

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5

Jönsson, Anette. "Model Studies of Surface Waves and Sediment Resuspension in the Baltic Sea." Doctoral thesis, Linköpings universitet, Tema vatten i natur och samhälle, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4680.

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Wave heights and periods of surface waves in the Baltic Sea have been modelled for a two-year period (1999-2000) with the wave model Hypas on an 11x11-km grid scale. There is a clear seasonal variation with higher waves during winter and lower during summer. This is mainly a reflection of the wind climate in the area where the winters are windier than the summers. The largest waves are found in the Skagerrak and over the deeper, eastern areas in the Baltic Proper. In the Baltic Sea, the surface waves influence the bottom sediment by initiating resuspension down to 80 m depths. This process is

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6

He, Zhiguo. "Numerical simulation of flow, sediment, and contaminant transport in integrated surface-subsurface systems /." Full text available from ProQuest UM Digital Dissertations, 2007. http://0-proquest.umi.com.umiss.lib.olemiss.edu/pqdweb?index=0&did=1414125241&SrchMode=1&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1221163101&clientId=22256.

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7

Solaimani, Karim. "Estimating changes in morphology and sediment supply using remote sensing and field techniques in the Lar Dam Basin, Iran." Thesis, University of Glasgow, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321067.

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8

Beasley, Jeffrey S. "Nitrogen Regime Influence on Nutrient and Sediment Surface Runoff During Vegetative Establishment of Bermudagrass." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/31900.

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Bermudagrass (Cynodon dactylon (L.) Pers.) is a popular turfgrass used throughout the Southeast. Bermudagrass is established primarily as sprigs on large acreage sites. Currently, the industry standard practice (ISP) of fertilization during bermudagrass sprig establishment is 48.8 kg N ha-1 wk-1. This fertilizer rate can be excessive on morphologically immature sprigs in the initial weeks of establishment, thus making the possibility of offsite surface runoff N events more likely. Two experiments were conducted in 2000 and 2001 where sprigs were established at 2, 4, 6, 8, and 10 weeks pr

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9

Steenhauer, Kate. "An experimental and numerical study of surface-subsurface interaction for bore-driven swash on coarse-grained beaches." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources. Restricted: no access until Nov. 24, 2011, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=59381.

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10

Ståhlberg, Carina. "Mineralisation rates of natural organic matter in surface sediments affected by physical forces : a study of fresh- and brackish-water sediments subjected to changed redox conditions, resuspension, and advective pore water flow /." Linköping : Department of Water and Environmental Studies, [The Tema Institute], Linköping University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8332.

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11

Bilici, Cagdas. "Development of a Sediment Sampling Free Fall Penetrometer Add-on Unit for Geotechnical Characterization of Seabed Surface Layers." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/96146.

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In-situ geotechnical testing of surficial sediment layers in areas of active sediment dynamics can provide essential information about physical and geotechnical variations of sediment properties with regards to active sediment remobilization processes. For example, portable free fall penetrometers (PFFPs) can assist with the detection of mobile sediment layers. They are easy to deploy, and can provide a large spatial coverage in a time- and cost-effective manner. However, they often struggle to provide more detailed information about the properties of mobile sediment layers due to a lack of ca

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12

Reid, David A. "Reach-scale contributions of road-surface sediment to the Honna River, Haida Gwaii, B.C." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50061.

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Unpaved resource road surfaces may act as dominant sources of fine sediment to streams, yet their relative contribution to in-channel sediment yields remains poorly understood. Significant quantities of road-surface sediment have been observed entering the Honna River, B.C, a 5th order channel located is close proximity to a major, intensively used resource road. In September 2012, a reach of the Honna River was selected for measurement and instrumentation to compile a sediment balance with a focus on the relative importance of road surface sediment over an annual scale. An additional four mon

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13

Barlow, James Vincent. "Accumulation, transport and potential treatment of surface sediment on car parks with channel drains." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/10599.

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Urban pollutants have been identified as a significant source of environmental pollution, posing a risk to human health, the environment, and are toxic to flora and fauna. Highways are recognised as one of the key sources of pollution, from both vehicles, and surrounding infrastructure. A number of studies have investigated accumulation of sediment and the associated pollutants on highways, and the runoff generated as a result of rainfall. Car parks share many potential contributory sources of pollutants with highways, but there is a lack of studies regarding car parks, despite them being iden

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14

Shmelev, Alexey Alexandrovich. "Three-dimensional acoustic propagation through shallow water internal, surface gravity and bottom sediment waves." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/69241.

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Thesis (Ph. D.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2011.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 185-193).<br>This thesis describes the physics of fully three-dimensional low frequency acoustic interaction with internal waves, bottom sediment waves and surface swel

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15

Eke, O. C. Enyinna. "Surface water and sediment geochemistry in understanding mobility of nitrates in mesic Kansas grassland." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/13273.

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Master of Science<br>Department of Geology<br>Saugata Datta<br>To understand ambient nitrate dynamics in an unmanaged grassland environment, the stable isotope chemistry of various substrates at the Konza Prairie Biological Station were studied. Sediments consisted of alluvium, loess and bedrock materials are mostly limestone and shale. To gain a better understanding of the biogeochemistry of N cycling in this unmanaged grassland, 34 water samples have been collected along a full stretch of the major onsite creeks (Kings and Shane Creeks). These samples have been analyzed for δD, δ18O, and δ15

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16

Fincham, Mark J. "Coccoliths and oxygen isotope observations from the sediment surface of the southwest Indian Ocean." Master's thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/26540.

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The interplay of three important parameters, dissolution, dilution and winnowing seem to be controlling the state in which sediment material is preserved in the study area though most samples examined under the SEM were generally well preserved. The distribution of forty-four coccolithophore species in one hundred deep sea core-tops from the southwest Indian Ocean is described. Three coccolith assemblages have been recognised (Maputo, Agulhas Current and deep water) and are delineated by the relative abundances of four ecologically significant coccolithophore species (Gephyrocapsa oceanica, Em

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17

Huang, Lingyan. "Mass transport due to surface waves in a water-mud system." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B35380457.

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18

Schmidt, Susanne I. "Surface water, groundwater interactions and their association with sediment fauna in a Western Australian catchment /." Marburg : Tectum-Verl, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2660074&prov=M&dok_var=1&dok_ext=htm.

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19

Desilets, Sharon. "Flood Processes in Semi-arid Streams: Sediment Transport, Flood Routing, and Groundwater - Surface Water Interactions." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/195652.

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Flooding in semi-arid streams is highly variable but distinguished from its humid counterpart in terms of forcing conditions, landscape response, flood severity, and stream-aquifer connectivity. These floods have the potential for great benefit in a water-limited environment, but also great devastation when powerful floods encounter human infrastructure. This dissertation employs an integrative approach to address several facets of flooding in semi-arid streams. In particular, information from field sampling during flood events combined with modeling are used to evaluate the processes of po

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20

Bai, Yang. "Simulating Surface Flow and Sediment Transport in Vegetated Watershed for Current and Future Climate Condition." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/333038.

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The complex interaction between flow, vegetation and sediment drives the never settled changes of riverine system. Vegetation intercepts rainfall, adds resistance to surface flow, and facilitates infiltration. The magnitude and timing of flood flow are closely related to the watershed vegetation coverage. In the meantime, flood flow can transport a large amount of sediment resulting in bank erosion, channel degradation, and channel pattern change. As climate changes, future flood frequency will change with more intense rainfalls. However, the quantitative simulation of flood flow in vegetated

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Cantone, Carolina. "Modelling sediment connectivity in Swedish catchments and application for flood prediction of roads." Thesis, KTH, Mark- och vattenteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190612.

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Climate changes are predicted to increase precipitation intensities and occurrence of extreme rainfall events in the near future. Scandinavia has been identified as one of the most sensitive regions in Europe to such changes; therefore, an increase in the risk for flooding, landslides and soil erosion is to be expected also in Sweden. An increase in the occurrence of extreme weather events will impose greater strain on the built environment and major transport infrastructures such as roads and railways. This research aimed to identify the risk of flooding at the road-stream intersections, cruc

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22

Rouse, Helen Louise. "The development of a transfer function relating surface waves to bedload gravel transport using the self-generated noise technique." Thesis, University of Hull, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265126.

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23

Huang, Lingyan, and 黃凌燕. "Mass transport due to surface waves in a water-mud system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B35380457.

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24

Cakiroglu, Ayse Idil. "Salinity Inference In Inland Turkish Shallow Lakes On Paleoecology Using Sub-fossil Cladocera." Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615450/index.pdf.

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In the current study, sub-fossil Cladocera collected from the surface sediment of 44 shallow lakes spanning over five latitudes from north to south of Turkey using snap-shot methodology revealed strong impact of salinity on cladoceran community structure. To see the whole picture, sediment cores collected from six of the lakes and long-term monitoring data from two of the lakes were also investigated. Contemporary cladocerans and sub-fossil assemblages were compared to reveal that their responses to salinity changes were highly similar. This lead us to use sub-fossil cladocerans and salinity d

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25

Graham, George W. "Biomediation of turbulence and suspended sediment characteristics in marsh surface flows : the influence of Spartina anglica." Thesis, University of Plymouth, 2008. http://hdl.handle.net/10026.1/1765.

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Laboratory experimentation in a large aimular flume (radius 3 m, channel width and water depth 0.4 m) has been conducted using a geometrically and dynamically similar Spariina anglica mimic (canopy height 0.21 m, stem density 1000 stems m~^) to investigate the influence of submerged Spartina on hydrodynamics under unidirectional currents {Uh = 0.2 m s~*) and the impact upon the dynamics of suspended cohesive sediments near the bed within the canopy. The vertical distribution of canopy biomass strongly influences vertical profiles of time-averaged velocity and turbulent quantities. An inflected

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26

Sibali, LL, JO Okonkwo, and C. Zvinowanda. "Determination of DDT and Metabolites in Surface Water and Sediment Using LLE, SPE, ACE and SE." Springer Science, 2009. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001502.

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Abstract Surface water and sediment samples collected from Jukskei River in South Africa, were subjected to different extraction techniques, liquid–liquid (LLE), solidphase extraction (SPE), activated carbon extraction (ACE) and soxhlet extraction (SE) for sediment. The samples were extracted with dichloromethane, cleaned in a silica gel column and the extracts quantified using a Varian 3800 GC-ECD. The percentage recovery test for 2,40DDT, DDE and DDD and 4,40DDT, DDE and DDD in water ranged from 80%–96% and 76%–95% (LLE); 56%–76% and 56%–70% (SPE) and 75%–84% (ACE), respectively; while that

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27

Roussel, Erwan G. "Subseafloor archaeal communauties : from the surface to a deep hot biosphere ?" Brest, 2008. http://www.theses.fr/2008BRES2019.

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La biosphère de sub-surface océanique représente les deux tiers de la biomasse de la Terre. Ces importantes populations microbiennes enfouies sous la surface du plancher océanique jouent un rôle clé dans les cycles biogéochimiques. Bien que la profondeur maximale de cette biosphère de sub-surface ne soit toujours pas déterminée actuellement, celle-ci serait limitée par des facteurs physico-chimiques tels que la température ou l’absence de source d’énergie. Certains microorganismes non-cultivés du domaine des Archaea jouent probablement un rôle majeur dans l’écosystème sédimentaire marin profon

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28

Ruiz, Rueda Olaya. "Nitrifying and denitrifying bacterial communities in the sediment and rhizosphere of a free water surface constructed wetland." Doctoral thesis, Universitat de Girona, 2008. http://hdl.handle.net/10803/7871.

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La contínua descàrrega de nutrients, sobretot fosfats i nitrogen, és la major causa d'eutrofització dels ecosistemes aquàtics. Els sistemes de tractament basats en aiguamolls construïts s'han emprat per reduir ells nivells de nitrogen a l'aigua com a alternativa de baix cost als mètodes de depuració convencionals. L'eliminació del nitrogen a aquests sistemes depèn en bona part de la vegetació, i l'alternança de condicions aeròbiques i anaeròbiques per promoure els processos de nitrificació i desnitrificació. En aquest treball hem volgut investigar les activitats microbianes de nitrificació i

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29

Langlois, Jacques. "Nutrient and sediment movements from soil to surface water in a forested watershed and two agricultural fields." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19751.

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In North America, the acceleration of the eutrophication of surface waters due to nutrient pollution is still present. Soil studies have not entirely succeeded in linking nutrient and sediment losses to field hydrology because relationships between discharge and dissolved ions/sediments are complicated by a hysteresis effect which has been only described qualitatively. The objective of this thesis was to better understand the effects of hydrology on N, P, and sediment transfer from agricultural and forest soils to surface waters. This was done by developing a technique, called the H index, to

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30

Sabat, Mira. "Mathematical modeling of suspended sediment transport in free surface flows : from the empirical to the numerical approach." Strasbourg, 2011. http://www.theses.fr/2011STRA6130.

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La distribution verticale de la concentration des sédiments en suspension joue un rôle majeur dans l’étude du taux et la capacité de transport d’une rivière. Il existe, dans la bibliographie, plusieurs modèles de distribution des vitesses et des concentrations dont les conditions d’utilisation sont souvent ambigües. Vue la difficulté des mesures sur terrain, il est nécessaire d’utiliser et de savoir choisir un profil numérique. Le but de cette thèse est de concevoir de nouveaux outils pour étudier la distribution verticale des vitesses et des concentrations. Dans ce contexte, nous présentons d

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31

Yu, Chunshui. "Two Dimensional Finite Volume Model for Simulating Unsteady Turbulent Flow and Sediment Transport." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/301662.

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The two-dimensional depth-averaged shallow water equations have attracted considerable attentions as a practical way to solve flows with free surface. Compared to three-dimensional Navier-Stokes equations, the shallow water equations give essentially the same results at much lower cost. Solving the shallow water equations by the Godunov-type finite volume method is a newly emerging area. The Godunov-type finite volume method is good at capturing the discontinuous fronts in numerical solutions. This makes the method suitable for solving the system of shallow water equations. In this dissertatio

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32

Silva, Camila MagalhÃes. "Detection Aeromonas spp. in surface water samples and sediment along a salinity gradient in river estuary CocÃ - CearÃ." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13386.

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This research work was designed to detect the presence of Aeromonas in the CocÃ River estuary, Fortaleza, CearÃ State, Brazil. The database consisted of 30 samples of the riverâs surface water and 30 samples of the riverâs sooil, in the period from September, 2007 to April, 2008.. They were amenable, simultaneously, to counting of bacteria on Agar Gelatin Phosphate Salt (GSP) plus 20μg/mL of ampicilim (UFC/mL or UFC/g) The results showed dissemination of Aeromonas in the estuary. The counts for the water samples varied from 10 to 7,050 and from 25 to 38,500 UFC/mL at points A and B respe

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33

Ståhlberg, Carina. "Mineralisation rates of natural organic matter in surface sediments affected by physical forces." Licentiate thesis, Linköping University, Linköping University, Department of Water and Environmental Studies, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8332.

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<p>Nedbrytning av organiskt material är en nyckelfaktor som påverkar omvandlingar av de många grundämnen som utgör eller är associerade till just organiskt material. En stor del av nedbrytningen av akvatiskt organiskt material (OM) sker i gränsskiktet mellan sediment och vatten. Eftersom så många biogeokemiska cykler styrs av nedbrytningen av OM är det viktigt att ha kunskap om processer och påverkansfaktorer både på mikro- och makronivå. Mineraliseringshastigheten av OM är en vanligt förekommande mätparameter, men vanligtvis inkluderar mätningarna inte de naturliga processer som kan påverka n

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34

Saxton, H. Thomas. "Soil genesis studies of upland soils formed in transported materials overlying the Virginia Piedmont using trend-surface analyses." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01102009-063235/.

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35

Russo, Joseph Paul. "INVESTIGATION OF SURFACE FINE GRAINED LAMINAE, STREAMBED, AND STREAMBANK PROCESSES USING A WATERSHED SCALE HYDROLOGIC AND SEDIMENT TRANSPORT MODEL." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/750.

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Sediment transport at the watershed scale in the Bluegrass Region of Kentucky is dominated by surface fine grained laminae, streambed, and streambank erosion; high instream sediment storage; and surface erosion processes. All these processes can be impacted by agricultural, urban, and suburban land-uses as well as hydrologic forcing. Understanding sediment transport processes at the watershed scale is a need for budgeting and controlling sediment pollution, and watershed modeling enables investigation of the cumulative effect of sediment processes and the parameters controlling these processes

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36

CARDOSO, CARLOS EDUARDO. "SOLID SURFACE ROOMTEMPERATURE PHOSPHORIMETRY FOR THE SELETIVE DETERMINATION OF NITROGENATED AND SULPHURATED POLYCICLIC AROMATIC COMPOUNDS INGASOLINE AND SEDIMENT SAMPLE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=10085@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>PETRÓLEO BRASILEIRO S. A.<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Neste trabalho, métodos analíticos baseados na fosforimetria na temperatura ambiente foram desenvolvidos para a determinação de sete compostos policíclicos aromáticos (CPA) sulfurados e nitrogenados presentes do petróleo. Mais especificamente, o objetivo foi o de fornecer ferramentas analíticas que permitissem avaliar e quantificar estes CPA em gasolina e em uma amostra ambiental (sedimento). Adicionalmente, a informação obtida através da fos

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Bartlett, Joseph Hollis. "Impacts of Transportation Infrastructure on Stormwater and Surface Waters in Chittenden County, Vermont, USA." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/426.

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Transportation infrastructure is a major source of stormwater runoff that can alter hydrology and contribute significant loading of nutrients, sediment, and other pollutants to surface waters. These increased loads can contribute to impairment of streams in developed areas and ultimately to Lake Champlain. In this study we selected six watersheds that represent a range of road types (gravel and paved) and road densities (rural, suburban, and urban) present in Chittenden County, one of the most developed areas in Vermont. The location and density of road networks were characterized and quantifi

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Beazley, Melanie J. "The significance of organic carbon and sediment surface area to the benthic biogeochemistry of the slope and deep water environments of the northern Gulf of Mexico." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969/534.

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Pollock, Matthew John. "Geomorphic Differences between Unmined and Surface Mined Lands in Southeastern Ohio." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429613137.

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Brummer, Christopher Jon. "Influence of mass wasting on bed-surface armoring, lag formation, and sediment storage in mountain drainage basins of western Washington State /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/6738.

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Brown, Kristopher Ryan. "Sediment Delivery from Reopened Forest Roads at Stream Crossings in the Virginia Piedmont Physiographic Region, USA." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/48424.

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Efforts to control surface runoff and erosion from forest roads at stream crossings are critical for the protection of aquatic ecosystems in forests. In this research, annual and event-based sediment delivery rates were estimated for reopened legacy roads at forest stream crossings in the Virginia Piedmont physiographic region, USA. Sediment delivery rates were compared among stream crossing approaches with diverse intensities of best management practice (BMP) implementations for surface cover and water control. Model predictions from the Water Erosion Prediction Project (WEPP) were compare

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42

Wijekoon, Nishanthi. "SPATIAL AND TEMPORAL VARIABILITY OF SURFACE COVER IN AN ESTUARINE ECOSYSTEM FROM SATELLITE IMAGERY AND FIELD OBSERVATIONS." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1194621824.

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43

Kreuger, Jenny. "Pesticides in the environment : atmospheric deposition and transport to surface waters /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5485-9.pdf.

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Santos, Julio Cesar Neves dos. "Hydrological and sedimentological processes in a tropical semiarid climate." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=15010.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>The understanding of processes such as the generation of surface runoff, sediment yield and their relations with the rainfall regime is the basis for the planning and effective management of soil and water resources in a watershed. In this context, the present study aims to identify the main processes that influence the generation of surface runoff and sediment yield in small watersheds, and determine parameters for empirical sedimentological models, as well as the Sediment Delivery Ratio (SDR) for the tropical, semi-arid region

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Marchal, Noe͏̈lle. "Relargage des micropolluants organiques par les sédiments de fond de rivière." Paris 5, 1992. http://www.theses.fr/1992PA05P044.

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Pankau, Ryan C. "CONCENTRATED FLOW PATHS IN RIPARIAN BUFFER ZONES OF SOUTHERN ILLINOIS." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/212.

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Riparian buffers in agricultural landscapes are designed to trap pollutants in overland flow by slowing, filtering, and infiltrating surface runoff entering the buffer via sheet flow. However, observational evidence suggests that concentrated flow is prevalent from agricultural fields. Also, over time sediment can accumulate in riparian buffers forming berms that restrict sheet flow from moving into the buffers; these berms ultimately back up surface runoff, resulting in an eventual breakthrough which concentrates runoff. Breakthrough by concentrated flow can lead to gully formation that ma

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Lécrivain, Nathalie. "Étude de la contamination et de l'écotoxicité associée des sédiments de surface en zone littorale lacustre." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSET001/document.

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La zone littorale, de grande importance pour le fonctionnement écologique du lac, est souvent la première zone réceptrice de la contamination provenant du bassin versant. Cette pollution est majoritairement piégée dans les sédiments de surface. Pour autant, les conditions environnementales variables qui règnent en zone littorale sont susceptibles de favoriser la biodisponibilité des contaminants par le jeu des réactions physico-chimiques et biologiques. Cette thèse s’appuie sur l’étude de deux grands lacs péri-alpins, le Lac du Bourget et le Lac d’Annecy, pour mieux comprendre le comportement

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Gonçalves, Paulo Eduardo Reinach da Silva. "Determinação de metais potencialmente tóxicos em amostras de água e sedimentos nas bacias dos rios Cuiabá e São Lourenço - MT." Universidade Federal de Mato Grosso, 2014. http://ri.ufmt.br/handle/1/656.

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Submitted by Valquíria Barbieri (kikibarbi@hotmail.com) on 2018-04-06T20:16:40Z No. of bitstreams: 1 DISS_2014_Paulo Eduardo Reinach da Silva Gonçalves.pdf: 3069959 bytes, checksum: 7c8ac2afa091cf84c470aa2114a36f3f (MD5)<br>Approved for entry into archive by Jordan (jordanbiblio@gmail.com) on 2018-04-23T18:32:55Z (GMT) No. of bitstreams: 1 DISS_2014_Paulo Eduardo Reinach da Silva Gonçalves.pdf: 3069959 bytes, checksum: 7c8ac2afa091cf84c470aa2114a36f3f (MD5)<br>Made available in DSpace on 2018-04-23T18:32:55Z (GMT). No. of bitstreams: 1 DISS_2014_Paulo Eduardo Reinach da Silva Gonçalves.pdf: 3

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Rodrigues, Joseilson Oliveira. "O uso da terra e a resposta hidrolÃgica de pequenas bacias em regiÃes semiÃridas." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5215.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>O objetivo central desse trabalho foi avaliar e comparar o comportamento hidrolÃgico e sedimentolÃgico em pequenas bacias rurais no semiÃrido nordestino, verificando a influÃncia da aÃÃo antrÃpica sobre os recursos solo e Ãgua. O estudo desses processos Ã de suma importÃncia na definiÃÃo de estratÃgias para o melhor gerenciamento de pequenas bacias hidrogrÃficas e na definiÃÃo de planos de sustentabilidade. A Ãrea de investigaÃÃo localiza-se na bacia do Alto Jaguaribe, mais precisamente no municÃpio de Iguatu, na regiÃo conhecida

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Rodrigues, Joseilson Oliveira. "O uso da terra e a resposta hidrológica de pequenas bacias em regiões semiáridas." reponame:Repositório Institucional da UFC, 2009. http://www.repositorio.ufc.br/handle/riufc/18197.

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RODRIGUES, Joseilson Oliveira. O uso da terra e a resposta hidrológica de pequenas bacias em regiões semiáridas. 2009. 128 f. : Dissertação (mestrado) - Universidade Federal do Ceará, Centro de Ciências Agrárias, Departamento de Engenharia Agrícola, Curso de Mestrado em Engenharia Agrícola, Fortaleza-CE, 2009.<br>Submitted by demia Maia (demiamlm@gmail.com) on 2016-07-07T14:22:18Z No. of bitstreams: 1 2009_dis_jorodrigues.pdf: 16309402 bytes, checksum: b2ab17d81f17cb85baf29eae39b670db (MD5)<br>Approved for entry into archive by demia Maia (demiamlm@gmail.com) on 2016-07-07T14:23:26Z (GMT) No.

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